Worst service I have experienced to date !

The worst service i have experienced. I emailed 2 days ago to change my debit order dates and received no response. I followed up yesterday and still no response ( I emailed ***). Today I decided to call as my debit order date is getting closer and I urgently needed assistance. I finally got through to a lady who told me that I need to notify them 5 days before the debit order date ( which I did try when I sent the email 2 days ago) she proceed to tell me that there is nothing she can do to help me and i must let my debit order run on the date and then they will try again in 10 days, after they have successfully debited me I must call back again and request the debit order date. I asked if maybe she could call me to folllow up and she proceeded to tell me how her call centre works and that they do not call customers. I asked to speak to a manager she said they were all in a meeting. I mentioned to her how inconvenient it is as I am calling now to change the debit order as I have limited time to call. She also mentioned that I cannot send an email regarding this and that I need to call in. Throughout the whole phone call she kept talking over me and repeating herself and still couldnt give me a proper solution to this problem. She eventually put the phone down. I am highy concerned and the customer service that Wesbank has given me !!!